The young bucks, hanging around the Royal Stag like a bad smell trying to steal his ladies, are full of testosterone. Every now and then it burst over and they had a little go at each other (nothing like the rut we saw last year) and the girls moved well away.
This one was possibly looking like it was going to be quite good when suddenly a third young buck joined in; I've never seen a rut with three deer and it very quickly ended before one of them got hurt